- capable of reacting or functioning in two, usually opposite, directions.
Origin of bidirectional
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- computing (of a printhead) capable of printing from left to right and from right to left
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for bidirectionality
Online Etymology Dictionary, © 2010 Douglas Harper